Chuck for rock-drills.



1. c. H. VAUGHT'.

CHUCK FOR ROCK DRILLS.

APPLICATION FILED MAR. 3, I9 l4.

Patented Feb.8, 1916.

3 SHEETS-SHEET 1.

1.0. H. VAUGHT.

CHUCK FOR ROCK DRILLS.

APPLICATION FILED MAR. 3, I914.

* Patented Feb. 8, 1916.

3 SHEETS-SHEET 2- x a 2/4 i5;

Jig/4 E6 To all whom it may concern:

TE Pernn r orr cn.

JAMES c. n. VAUGHT, or DETROIT, MICHIGAN.

I sme ma ROCK-DRILLS.

Be it known that I, J AMES C. H. VAUerIT, a citizen of the United States ofAmerica, residing at Detroit, in the county of WVayne and State of Michigan, have invented certam new and useful Improvements 1n Chucks for Rock-Drills, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to chucksfor rock drills and more particularly to that type disclosed by Patent No. 80430 1, granted to me November 21st,1905, Patent No. 1,068,612, I

granted 'to me July 29th, 1913, and Patent No. 1,083,310, granted to me January 6th, 1914, all of which show elfective devices to facilitate the operation of changing drills. v

The present invention'aims to provide a simple, durable and inexpensive chuck embodying a sliding sleeve having aprojection at an end thereof to receive a hammer blow when itis desired to release the sleeve from the tapered face of a gib forming part of the chuck. I

The invention further aims to provide a perfectly balanced chuck wherein provislon is made to preclude any possibility of interior parts thereof becoming torn-out or displaced, due to the stresses and strains to which the chuck is subjected.

- 'The invention further aims to provide a chuck having a sleeve projection arranged to project over'the retaining and releasing key, thus eliminating any danger of the same being broken, particularly when used in connection with that type of chuck disclosed by Patent No. 1,083,310;

The invention still further aims to ac complish the above and other results by a mechanical construction that will be hereinafter specifically described and; then claimed, and reference will now behad to the drawings, wherein,

Figure 1- is a longitudinal sectional view of a preferred form of chuck; Fig.2 is a cross sectionalview of the same taken on the line aa of Fig. 1; Fig. 3 is a plan View of a retaining and releasing key;-Fig. 4 is a 'plan'of a gib; Fig. 5 is a plan of the chuck illustrated in. Fig. 1 and: Fig. 2; Fig. 6 is a longitudinal sectional view showing a chuck like that illustrated'in Fig. 1 with [the retaining and releasing key omitted;

.Fig. 7 is across sectionalview taken on the I Specification of Letters Patent. I P t ted 1915 Application filed Marcus, 1914. Serial No. 822,245;

' the modified form of retaining and releasing key shown in Fig. '10; Fig. 12 is a top plan showing a slightly modified formof chuck;

Fig. 13 is a cross sectional view taken'on a line cZ-cZ Fig. 12; Fig. 14 is a side elevation ofthe sleeve shown in Fig. 8; Fig. 15 is a top plan of the same; Fig. 16 is a longitudinal sectional View of a slightly modified form of chuck as compared with any of the above cited figures; Fig. 17 is a cross sectional View taken on'the linee'-e Fig. 16;

Fig. 18 is a top plan of the chuck shown in Fig. 16; Fig. 19 is a cross'sectional view taken on the line f-f Fig. 18; Fig 20 is a side elevation of the retaining and releasing key shown in Fig. 16, and Fig. 21.is a top plan of the same.

In 'descrlblng my invention by of the views "above referred to, I desire to point out that I intend the same as merely illustrative of an-example whereby my invention 7 may be applied inpractice, and I do not "limit my invention to the precise arrange- .ment and construction of parts shown. The

following description is therefore to be broadly construed as including such constructions and arrangements as are the obvious equivalent of' those shown.

. Reference will first behad to Figs. 1 to 5 inclusive illustrating the preferred form of construction. Asbest shown in Figs. 2 and 3, the, chuck comprises a sleeve 1 having diametrically opposed exterior longitudinal enlargements or ribs 2 and3 and these enlargements are provided with longitudinal tapering grooves 4L and 5 respectively, said grooves tapering in opposite directions and having the rounded bottoms thereof in substantially'parallel planes, as best shown in Fig; 1. The grooves 4 and 5' are in com- 'munication with the cylindrical bore or longitudinal opening "of the sleeve Land the innerend of the enlargements 2 and 3am beveled, as M7, at the inner end of the sleeve. The inner end of the sleeve has, the

sides thereof cut away, as'atll, to form notched-bearings 12, the purpose of which will; presently appear. 'The, outer ends of "theenlargements 2 and3 protrude from the outer or front end of the sleeve by the sides of the sleeves or body being cut away, as at 8. v

Adjustably mounted in the groove 4. of the enlargement 2 is a tapering key :9 having a fiat side 10. The opposite side of the tapering key is rounded to conform to "the rounded bottom of the groove 4: and said rounded side of said key has an integral projection orst-ud 13 extending into a recess or opening 14 provided therefor in the enlargement 2 of the sleeve. One side of the stud 13 is disposed at a right angle "to the longitudinal axis of the chuck to form a shoulder and the opposite side thereof is inclined or beveled, as at 15, opposite a beveled Wall of the recess or slot 14. The outer end of the stud 13 is flush with the surface of the "enlargement 2, and said key is of a length slightly greater than the enlargement, whereby the inner beveled end 16 thereof will protrude from the inner end of the groove 4.

Slidably mounted in the groove 5 of the sleeve 1 is a gib 17 having the bottom thereof rounded to conform to the rounded bottom of the groove 5. The top of the gib 17 is substantially fiat and is provided with an oblong tongue 18 having a concave face 19. The tongue 18,;i's of a less Width than 'the gib, as best shown in Fig. 2, and provides longitudinal shoulders 20.

Extending into the sleeve 1 of the chuck is a head or body 21 having the outer end thereof provided With a socket 22 contain: ing a bushing 23 adapted to receive the shank 2 1 of a'drill steel. The body :21 has the top thereof provided with a longitudinal groove 25 to receive the key 9 and the bottom of said head is cutaway and slotted to receive the gib 17, the tongue of said gib extending into a slot of the bushing 23 to engage the shank 26E of the drill.

'The head 21 has a transverse opening and mounted in said "opening is a pin 26 which is engaged by the notched side bearings 12 of the sleeve of the chuck, said pin cooperating with the key 9 and thegib 17 in preventing the "sleeve and the drill from becoming accident-ally displaced relatively to the body 21.

With the various elements assembled as described, the end of the key '9 is housed by the enlargement 2, consequently it is practically impossible to break the end of the key and impair its usefulness. All of the small p arts of the chuck are securely housed by the sleeve.

In Figs. 6 and 7 there isillustrated 2.81 111- p'hfi'ed form of chuck wherein the releasing key 9 is dispensed with, consequently it is not necessary to provide the head or body 21 with the groove 25. In a great many instances, the gib 17 is suflicient to hold the ,drill, and in this 'constructionthe 'sleeve i's much stronger and serves as well as the pre ferred form of chuck.

In Figs. "8 to 15 inclusive there is illustrated a further modification of the invention, wherein a key 27 has side extensions 28 serving the same purpose as the stud 13 of the preferred form of construction. The inner walls of the sleeve are cut away, as at 29, to provide clearance for the side extensions 28 and the sides of the sleeve have diametrically opposed openings 30. The key 27 is similar in other respects to the key 9, and the construction of the sleeve is best shown in Figs. ll and 15, where it will be observed that the upper inner wall of the sleeve has a groove 31 to receive the rounded upper edge of the key, while the flat lower edge thereof rides in the groove 25 of the body 21.

A still further modification of the invention is illustrated in Figs. 16 to 21, wherein a stud 32 on a bar 33 extends into an angu larly disposed slot 34 in the top of the en largement 2 of the sleeve, and besides this construction, the taper of the key or bar is dispensed with, since said bar is practically self-tightening and cooperates with the gib in properly holding the shank of a drill.

I attach considerable importance to the fact that the most essential elements of the chuck are fully protected by the sleeve and by providing the key with a lateral projection to engage a recess in the sleeve, the key is held in place wholly within the sleeve, so that the heavy strokes and jars to which a tool of this character is subjected will not cause the key to snap off.

WVhat Iclaim'is:

1. In a drill chuck, the combination with a body having a shank socket, and a gib slot I leading thereto, of a gib having an inclined outer face, a releasing key having an oppositely inclined outer face, a sliding sleeve provided with grooves to engage the gib and key and force the gib inward, and a projection on the front end of the sleeve for the purpose specified.

2. In a drill chuck, the combination with a body having a shank socket, and a gib slot leading thereto, of a gib having an inclined outer face, a retaining and releasing key having an oppositely inclined outer face, a projection on the key, the same being removed from the ends of the key, a sliding sleeve provided with grooves :to engage the gib and key and force the gib inward, a re cess in the sleeve to accommodate the projection 'on the key, and a projection on the front end ofthe sleeve for the purpose specified.

3. In a drill chuck, the combination with :a body having a shank socket, and a gib slot leading thereto, of a gib adapted to the slot, a retaining and releasing key provided with a shoulder removed from its opposite ends, alsliding sleeve provided with interior lonto said socket, a gib in the slot, and a mov-' able sleeve surrounding the body and gib, the sleeve being provided With a projection on its front end as and for the purpose speci-' 5. In a chuck for rockdrills having a body and a socket therein to receive the shank of a drill steel, a slot leading to said socket, a gib in the slot, and a sliding sleeve surrounding the body and gib, said sleeve being provided With projections on its front end, for the purpose specified.

6. In a chuck for rock drills having a body and a socket therein to receive the shank of a drill steel, a slot leading to said socket, a longitudinally movable sleeve surrounding the body and gib, the movable sleeve being provided With an exterior rib and an interior groove to accommodate the gib, and projections on the front end of the movable sleeve for the purpose specified.

7. In a drill chuck, the combination With a body having a socket therein to receive the shank of a drill steel and a gib slot leading thereto, of a gib in the slot, a retaining key, a sliding sleeve surrounding the body, gib and key provided with interior grooves and With exterior ribs in Which the grooves are located, and a projection on the front end of the sleeve, for the purpose specified.

V 8. In a drill chuck, the combination With a body having a shank-socket, of a gib having an inclined outer face, a retaining and releasing key having a shoulder removed from its ends, a movable member surrounding the body gib and key and provided With a recess corresponding to the shoulderion the key and With interior longitudinal grooves to correspond With the gib and key for the purpose specified.

In testimony whereof I affix my signature in presence of tWo Witnesses.

, JAMES C. H. VAUGHT. Witnesses:

ANNA M. Donn, LEWIS E. FLANDERs.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. 0. 

